Giovanni giovannibenussi

A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

	# in controller

	# for local files
	send_file '/path/to/file', :type => 'image/jpeg', :disposition => 'attachment'

	# for remote files
	require 'open-uri'
	url = 'http://someserver.com/path/../filename.jpg'
	data = open(url).read
	send_data data, :disposition => 'attachment', :filename=>"photo.jpg"

	# Custom key mappings
	map n scrollDown
	map N previousTab

	map e scrollUp
	map E nextTab

	map i scrollRight
	map I goForward

	my_array = %w[test one two three]

	# Inject takes the value of the block and passes it along
	# This often causes un-intended errors
	my_array.inject({}) do \|transformed, word\|
	puts transformed
	transformed[word] = word.capitalize
	end
	# Output:
	# {}

	<?php

	/* From https://www.usps.com/send/official-abbreviations.htm */

	$us_state_abbrevs_names = array(
	'AL'=>'ALABAMA',
	'AK'=>'ALASKA',
	'AS'=>'AMERICAN SAMOA',
	'AZ'=>'ARIZONA',
	'AR'=>'ARKANSAS',

	#Model

	@user.should have(1).error_on(:username) # Checks whether there is an error in username
	@user.errors[:username].should include("can't be blank") # check for the error message

	#Rendering
	response.should render_template(:index)

	#Redirecting
	response.should redirect_to(movies_path)

	es:
	errors:
	messages:
	expired: "ha expirado, por favor pide una nueva"
	not_found: "no encontrado"
	already_confirmed: "ya fue confirmada. Intenta ingresar."
	not_locked: "no ha sido bloqueada"
	not_saved:
	one: "Ha habido 1 error:"
	other: "Han habido %{count} errores:"

	# you have ctags but it does not work...
	$ ctags -R --exclude=.git --exclude=log *
	ctags: illegal option -- R
	usage: ctags [-BFadtuwvx] [-f tagsfile] file ...

	#you need to get new ctags, i recommend homebrew but anything will work
	$ brew install ctags

	#alias ctags if you used homebrew
	$ alias ctags="`brew --prefix`/bin/ctags"

	# app/config/deploy.rb

	# Most of the changes specific to your environment will be set in
	# the `app/config/deploy/[env].rb` files.

	# define multiple deployments

	set :stages, %w(production staging)
	set :default_stage, "staging"

	module Enumerable
	def pluck(key)
	map {\|obj\| obj[key] }
	end
	end